"Since Mr. Zhou asked everyone to speak freely, then I will throw the bricks and attract the jade."

"Our research team mainly studies the freezing method. Since it started several decades later than abroad, it is therefore more than foreign frozen law to make fresh water. Our country has just started in this regard. Therefore, the results are relatively unpredictable. ... There are two main problems we encountered. The first is that it consumes more energy, and the second problem is that the fresh water produced has poor taste and is difficult to use for domestic water..."

The people around him nodded from time to time as they listened to Professor Wu's report; Liu Feng also nodded.

He also learned that the freezing method of making fresh water is indeed a thankless thing.

As Professor Wu Qingquan said, this method always has two problems that cannot be overcome in creating tamsui.

The so-called freezing means that frozen seawater freezes, so it will inevitably consume a lot of energy. This is one of them. At the same time, when liquid seawater becomes solid ice, the salt is separated, but the separation effect is not good. Therefore, the taste of fresh water obtained is much better than seawater, but it is still difficult to satisfy. This is the second.

Professor Wu Qingquan's research team is more like being driven to the shelves. However, not everyone is for fame and fortune, especially scientists, and there are not too many people who don't care about fame and fortune.

Even though he knew that this method had a bad prospect, Professor Wu Qingquan took the initiative to take it over when he was assigned to this task.

Therefore, in Liu Feng's view, Professor Wu's throwing of bricks is more like doing work reports.

Liu Feng was deeply impressed by Professor Wu Qingquan's team and expressed deep sympathy.

It is obvious that the freezing method is a thankless method. It is completely incomparable to other methods in terms of research costs and application prospects. The reason why people still need to study is probably due to the perspective of technical reserves.

Everyone on the rostrum or off the stage knew this well.

In fact, there are many research teams like Professor Wu Qingquan and others.

Although some fields have no output in a short period of time and even have no prospects, someone must continue to do it, such as the general theory of theoretical physics.

Although the importance of frozen seawater desalination projects is not as important as the general direction of theoretical physics, China, which has just been studying seawater desalination for a few years, cannot help but invest in it.

Moreover, the situation is basically the same as the freezing method. The distillation method from Professor Liu Yingcai's team from Peking University and the dew point evaporation method from Professor Lu Fangping's team from Tongji are all such roles in accompanying the prince to study.

After explaining the research directions of several major representatives, it was finally the turn of the reverse osmosis method represented by Lian Xuewen and the multi-level flash speech represented by Wang Shichang.

"Ahem, then I'll say a few words too!"

There is a famous saying that the person who knows you best is not yourself, nor your partner, but your enemy.

As Lian Xuewen's main competitor, Wang Shichang saw that Lian Xuewen did not speak in front of him this time, but instead looked like he had nothing to say. Seeing Liu Feng, who was "free and free" on the other side, he didn't understand anything.

Now, in the field of reverse osmosis, there is a shit-scratcher that completely disrupts others' pace!

"Our research team mainly studies multi-stage flash evaporation technology. Although reverse osmosis membrane technology has developed rapidly in recent years, in terms of application, the global seawater desalination device still produces the largest production of multi-stage flash evaporation method, and the technology is also the most mature, with high safety and elasticity in operation. It is mainly jointly built with thermal power stations and is suitable for large and super-large desalination devices.

As for our country's national conditions, thermal power generation still accounts for more than half of the total power generation in the country. Therefore, compared with other methods, multi-stage flash evaporation technology is definitely the most promising in our country."

Liu Feng also seriously raised his ears and was very interested in Professor Wang Shichang's speech.

After all, in addition to reverse osmosis, the only thing that is more interesting in seawater desalination is multi-stage flash evaporation technology.

The so-called flash evaporate refers to the phenomenon that some seawater evaporates suddenly under the condition of sudden drop in pressure in a certain temperature. Multi-stage flash seawater desalination is to evaporate heated seawater in multiple flash evaporate chambers with gradually lower pressure in order to condense the steam to obtain fresh water.

Unlike the distillation method that requires heating seawater to boil, multi-stage flash evaporation can use the waste heat of other factories to heat seawater without boiling, so it saves a large part of the energy, and the cost is relatively lower than that of the distillation method.

Therefore, it is obvious that in addition to Liu Feng, others are also interested in multi-level flash evaporation technology; especially Zhang SHU on the rostrum, listening carefully with his ears, for fear of missing a word, while looking serious, and keeping notes in his hands.

At this time, Mr. Zhou also nodded seriously.

"What Professor Wang said is indeed true. So, at the most advanced level in our country or abroad, how much can the multi-stage flash evaporation technology cost per ton of fresh water now, and what is its main development trend? Can Professor Wang explain it in detail?"

"The main development trend of multi-stage flash evaporation technology in recent years is to improve the single-machine water production capacity of the device, reduce unit power consumption, improve heat transfer efficiency, etc.; compared with other methods, multi-stage flash evaporation technology is mature and operates reliably. In addition to labor costs, the current price of multi-stage flash evaporation technology is basically stable between 3 and 4 yuan per ton of fresh water."

"So, my suggestion is that next, we can focus on the development of seawater desalination on multi-stage flash evaporation technology. After all, the potential in this area is not dug up like the reverse osmosis membrane of polyamide composite materials."

After the speech of Professor Wang Shichang finished, he smiled and nodded to his peers and sat down. It was obvious that he was very satisfied with his peers' reactions, especially those of Mr. Zhou and Zhang SHU above.

The reactions of various peers to Professor Wang’s speech are naturally different.

Experts and professors engaged in multi-level flash evaporation related technologies all agreed, and other colleagues, especially those engaged in reverse osmosis research, even changed their faces.

Therefore, before Professor Wang's stool was hot, a voice came from the professor's seat at Zhejiang University.

"I don't agree with Professor Wang's speech."

Finally, Lian Xuewen stood up.

As a leader in the field of reverse osmosis research, if he doesn't speak, it will have a great blow to his prestige in this field.

"It turned out to be Professor Lian, you continued."

Zhang SHU has always been very low in front of scholars, and many scholars have a good impression of him.

After straightening the microphone, Lian Xuewen pondered for a moment and spoke.
Chapter completed!